Steam generator



1,627,666 May 10, 1927. M ROBBINS STEAM GENERATOR Filed Jan. 23. 1924 2 Sheets-Shet 1 INVENTOR.

ATTORNEY.

May 10,1927. 1,627,668

M. ROBBINS STEAM GENERATOR Filed Jan.23, 1924 2 Sheets-Sheet 2 IN VEN TOR.

BY Y

ATTORNEY.

Patented May 10,1927.

- UNITED STATES 1,627,668 PATENT OFFICE.

MEYER ROBBINS,- OF MALDEN, MASSACHUSETTS.

.s'rEAM' GENERATOR.

Application filed January 23, 1924. Serial No. 687,957.

This invention relates to steam generators and consists in the novel construction, combination and relation of parts described and illustrated in the accompanying specification and drawings and particularly pointed out in the appended claims;

My generator is particularly designed for household heating purposes, and accordingly I shall discuss it from this point of view in the present application, although it will be understood that such treatment is purely illustrative and in no way limiting.

In such a generator, it is essential that the required head of steam not only be quickly steam chamber, therefore, the 'water is at a.

temperature at which it can be quickly vaporized. This chamber is located directly over the firebox of the apparatus and the bottom thereof is provided with a plurality of radially extending spaced ribs which divide the water and assist in rapidly bring-' ing it to the point of 'ebullition. From the boiler compartment thus provided, thewater' circumferentlally corrugated or otherwise is caused to traverse the steam'c hamber from end to end thereof in alternately opposite directions whereby to insure complete vapor ization thereof. Preferably thestea m chamin a thin extended film bestvsuited for mediate vaporization. 7

As illustrative of the principles of myinvention, I shall show and describe herein a form which has been found satisfactory in use and well adapted to the requirements of manufacture.

In the drawings 2- Fig. 1 is a front elevation or a steam generator in accordance with my 111V8I1i31011;

of over which the water within said shell 2 is a fragmentary plan view thereof; Flg. 3 1s a transverse section on the'line 3'3 of-Fig. 4; Y

r Fig. '4 is a vertlcal section through the generator; and p Figs. 5 and 6 are transverse sections on the lines 5-5 and 6-6 respectively of Fig. 4.

of a steam generator in accordance with my invention, .and at 2 the firebox section there of, which section surmounts the section l and contains the usual grate 3. 7

' The firebox section 2 is water-jacketed .as indicated at 4, awater supply pipe 5 valved as at 6 is tapped into said water jacket.

I, have indicated at 1 the ash pit section 'Surmountmg the firebox section 2 is a generatorsection 7 which includes atop section 8 having a flue connection 9'provided wit'ha suitable damper 10. y Supported upon suitable lugs within the section 7 and spaced therefrom as shown in Fig. 4 is an inverted frusto-conical shell 11 defining a steam chamber 12 located directly over the firebox. The shell 11 is open at its top and closed at its bottom and is provided with a surmounting cover 13-having a steam outlet pipe 14 rising therefrom throughthe covered top section 8, the space between said covers 8 and 13 providing a passage 15 for v the escape of the flue gases. The closed bottom of the shell 11 is provided with; a plurality of spaced, radially extending ribs 11 and the-inner face of the shell wall is roughened as indicated at 16, to provide a series of annular ribs of progressively increasing diameter from bottom to top therespreads in thin extended film best suited for'immediate vaporization Mounted within the surrounding annular spacebetween the shell 11 and section 7 is a pair ofspaced enclosing shells 17 and 18 between which is'arranged a' pre-h-eater coil 19 for pre-heating the water delivered into "the steam chamber. The shell 17 rises from the firebox section 2 and the shell 18 depends from the flanged upper end 11 of the shell 11. The upper edge of the shell 17 terminates short ofthe flange 11 and the lower edge vof the shelllS terminates short of the firebox section fl whereby to permit a free circulation of heat about the shell and .said'steam chamberdrops below a predetermined point.

Axially mounted within the steam cham- -Y her 12 is a tube 24. into which thewater enchamber increases.

ters from below as the pressure within said At its lower end, the

- tube 2% is supported above and spaced from the closed bottom of the shell 11 by ade ,fiector which overlies-the ribs 11" of the shellbottom and defines therewith a boiler conipartment 11 in which the water is boiled as itgdescends thereinto past the perimeter of the deflector. The deflector itself slopes upwardly from its perimeter towards its center so as to direct the water within said boil-er compartment into the lower end of said tube 24C. At its upper end, the tube :24 is carried through a similar deflector 26 supported upon a series of spaced lugs 27 i projecting inwardly from the-shell 11.

Closing the upper end of the tube 24 beyond said deflecto1r26 is avacuum ball check -';valve.24t which is adapted to be unseatedby therising column of water in said tube as thepressure increases to thereby permit the water to escape downwardly over -the sloping deflector 26 and back into the shell -11 through the space between the perimeter of said deflector and the shell.

therefrom.

In operation water isvadmitted. into the water-jacket 4 from pipe 5 and. enters the pre-heater coil 19 for preheating before de, livery into the steam chamber 12 through pipe 22. The watercollects in the boiler oompartment'll and is rapidly heated due to the ribbed formation ofthe chamber bottom and to the proximity thereof to the firebozgand is directed by the upwardlysloping i andfiowing' downwardly along the sloping surface of the deflector 2 6 and back into the shell 11, being spread out over: the stepped corrugations 16 thereof in a thin, readily vaporized=-film. The steam rises upwardly within-saidshell past the deflectorl26 and out'through pipe 14 for service to the various feeder pipes of the heating system;

After the generator has been in action LA stearn-generator comprising a waterjacketed fire box :section, and an outside nghaving a'fiue connection, an inverted V Q-conical shell i mounted within and spaced-from said casing and. havinga closed bottom disposeddirectly- .over 1 the fire-box and a coverprovided with a steam outlet, said shell and cover ,constitutingia.steam. chamber, a pair of spaced shells disposed within the space separating saidsteam: cham beivshell from the casing andhdefiningwith said parts an upwardlyand downwardly directed passage for-the circulation ,ofheat from the fire-box, a pre-heatingacoil' dis- I posed-in thespace.betweenzsaid. pairof-lheat circulating shells 1 andconnecting at one end with said water jacket of thelirebox section and at its other; end delivering into said steamchamber shell, a float regulatingthe ,passa-ge-ofv'water from said coil into-said shell,- and a tube arranged axially within said shell, a vacuum-check valveclosin-g-the ,up-

per end -,of. said pipe and deflectorsat either end of said pipe for directing the water; into saidfpipe from below and downn llyv back into the Sl1ll- ;]FIOHL3l')OV8 whereby the n is given a traversing movement of the shell alternately in opposite directions.

4. 2. Astea n generator comprising a waterjacketed fireebox-section and an outside cas Hing having a flue connection, aninverted frusto-conical shell. mounted within and spaced from saidicasing andhaving a closed bottom disposeddirectly, over the fire-box and a cover provided with a steam out-let, said: shell and cover constituting a; steam chamber andgtheinnerface of theshell wall ,being corrugated from top. to bottom to provide a series ofexpansion surfaces of progressively-increasing diameter upwardly of the shell, over Whiclrthe .waterspreads in a. thin extended film,zapair of spacedsliells disposed within the space separating said steam chamber shell from the casing and ,definingwith said parts an upwardlyQand downwardly directed passage for the circu-..

lation of heat. from-the fire-box, a pre heating coil disposed in the space betweensaid pair of heat circulating shellsand-connecting at one end with said water jacket. of the: firebox, section and at its other end; .jdelivering into said steam chamber shell, and a float culating shells and connecting at one regulating the passage of water from'said coil into said shell, the bottom of said shell being formed with a plurality of radially disposed spaced ribs constituting a boiler section.

3. A steam generator comprising a waterjacketed fire box section, and anoutside casing having a fine connection, an inverted frusto-conical shell mounted within and spaced from said casing and having a closed bottom disposed directly over the fire-box and a cover provided with a steam outlet, said shell and cover constituting a steam chamber and the inner face of the shell wall being corrugated from top to bottom to provide a series of annular ribs progressively increasing diameter upwardly of the shell over which the water spreads in a thin eX- tended film, a pair of spaced shells disposed within the spaceseparating said steam chamber shell from the casing and defining with said parts an upwardly and downwardly di- -rected passage for the circulation of heat from the fire-box, a pre-heating coil disposed in the space between said pair of heat cir-l with said water jacket of the fire-box section and at' its other end deliveringinto said steam chamber shell, .a float regulating the passage of water from said coil into said shell, a tube arranged longitudinally within said shell, a vacuum check valve closing the upper end of said pipe, and deflectors at either end of said pipe for directing the water into said pipe from below and downwardly over the corrugations of said shell from above whereby the water is given a traversing movement of the shell alternately in opposite directions, the bottom of said shell being formed with a plurality of radially disposed spaced ribs constituting with the lower deflector a boiler section disposed immediately below the open end of said pipe and immediately above the fire-box.

4. A steam generator, comprising a water- I jacketed fire box section and an outside casing having a flue connectioma shell mounted within and spaced from sald casing and having a, closed bottom disposed directly over the fire-box and a cover provided with 'a steam outlet, said shell and cover con stituting a steam chamber, a pair of spaced shells disposed within the space separatlng said steam chamber shell from the casing and defining with said parts an upwardly and downwardly directed passage for the circulation of heat from the fire-box, and a preheating coil disposed within the space between said pair of heat circulating shells and connecting at one end with said-water acket of the fire-box section and at its other end delivering into said steam chamber shell.

.spacebetween said pair of heat circulating shells and connecting at one end with said water jacket of-the fire-box section and at its other end delivering into said steam chamber shell, the bottom :of said steam chamber shell being formed with a plurality of radially disposed ribs constituting a boiler section disposed immediately above the fire box.

In testimony whereof, I'hereunto aflix my MEYER ROBBINS.

signature this seventeenth dayof January, 

